María C. Martínez, Héctor H. García, Liliana Figuera, Verónica González, Félix Lamas, Katherinne López, Víctor Mijares, Yeasiry Corrales, María Lares, Elizabeth Ferrer,
... risk factors of toxocariasis in preschool children in Aragua state, Venezuela Get access María Martínez, María Martínez ... Ciencias de la Salud, Universidad de Carabobo Sede Aragua, Maracay, VenezuelabInstituto de Investigaciones Biomédicas 'Dr. Francisco J. Triana Alonso' (BIOMED) Universidad de Carabobo Sede Aragua, Maracay, Venezuela Search for other works by this ... Ciencias de la Salud, Universidad de Carabobo Sede Aragua, Maracay, Venezuela Search for other works by this ... Ciencias de la Salud, Universidad de Carabobo Sede Aragua, Maracay, Venezuela Search for other works by this ...
Tópico(s): Dermatological diseases and infestations
2015 - Oxford University Press | Transactions of the Royal Society of Tropical Medicine and Hygiene
María E. Girón, Vanessa Padrón, María Ramos, Elda E. Sánchez, Belsy Guerrero, Alberto García, Néstor L. Uzcátegui, Luís F. Navarrete, Alexis Rodrı́guez-Acosta,
... bioactivities of B. venezuelensis venoms from different regions (Aragua state; Waraira Repano (Capital District); Baruta, La Boyera ... Boyera 79%, Baruta 71%, Waraira Repano 68% and Aragua 64%. Toxic activities effects were: Intraperitoneal LD50s: Aragua-14 mg/kg; Waraira Repano-6.4 mg/ ... Lagunetica-16.2 mg/kg. The MHD results: Aragua-21.4 μg/mouse; Waraira Repano-2.5 ... 12 μg/mouse. The hide powder azure results: Aragua-1.24 U/mg; La Boyera-2.26 ... U/mg; Lagunetica-922.19 U/mg and Aragua-1960.67 U/mg. Casein zymography showed digestion ...
Tópico(s): Rabies epidemiology and control
2018 - Elsevier BV | Toxicon
María C. Martínez, Jesica Montero, Adriana Pineda, Víctor Mijares, María Lares, Emily Catalano, Elizabeth Ferrer,
... feline Toxocara spp. In Venezuela, seroepidemiological studies in Aragua State have been carried out only in preschool ... infection in school children in two municipalities of Aragua State of Venezuela.A cross-sectional field study ... of age was conducted in six schools in Aragua State. Immunoglobulin G antibodies against Toxocara spp. by ...
Tópico(s): Pediatric health and respiratory diseases
2018 - Oxford University Press | Transactions of the Royal Society of Tropical Medicine and Hygiene
D. Regüés, Estela Nadal‐Romero,
... in sediment export from badland areas. In the Araguás catchment (central Pyrenees) there is a statistically significant ... stations close to badland areas in the Pyrenees (Araguás) and the Alps (Draix) indicates that these fluxes ... floods (August 2006 and February 2007) in the Araguás catchment it was observed that the mean suspended ...
Tópico(s): Hydrology and Watershed Management Studies
2012 - Elsevier BV | CATENA
Estela Nadal‐Romero, D. Regüés,
... the geomorphological dynamics of badland areas in the Araguás catchment (0.45 km 2 ) in the Central ... Eocene marls and a markedly seasonal climate. The Araguás catchment has been monitored since 2004. Analysis of ...
Tópico(s): Hydrology and Sediment Transport Processes
2010 - SAGE Publishing | Progress in Physical Geography Earth and Environment
Estela Nadal‐Romero, D. Regüés, Jérôme Latron,
The Araguás Catchment of the Central Spanish Pyrenees has been monitored since 2004 to study weathering, erosion, and the ... discharge, a gauging station was installed within the Araguás Catchment during the summer of 2005. The aim ... during rainfall events. From a hydrological viewpoint, the Araguás Catchment reacts to all rainfall events with torrential ...
Tópico(s): Hydrology and Watershed Management Studies
2008 - Elsevier BV | CATENA
Estela Nadal‐Romero, Jérôme Latron, C. Martí‐Bono, D. Regüés,
... temporal patterns of suspended sediment yield in the Araguás catchment, Central Spanish Pyrenees, a small experimental catchment ... analysis. The main observed features indicate that the Araguás catchment reacts to all rainfall events, resulting in ...
Tópico(s): Hydrology and Watershed Management Studies
2007 - Elsevier BV | Geomorphology
Ekaterina Bustamante, Freyli Bustamante, Gilberto González, Luz Angie Bustamante,
... de Bioanalisis de la Universidad de Carabobo Sede Aragua, Venezuela. Material y metodos: Estudio de campo de ... of Carabobo Faculty of Science in Health Headquarters Aragua, Venezuela. Material and methods: The fieldwork used was ...
Tópico(s): Health and Lifestyle Studies
2016 - Escuela Nacional de Medicina del Trabajo | Medicina y Seguridad del Trabajo
Elena Román, Roland Klober, Jesús Manzanilla,
... presence of Amblyomma cajennense in the states of Aragua and Cojedes for the first time. The processed ... there are now seven species of Amblyomma in Aragua state.
Tópico(s): Mosquito-borne diseases and control
2002 - Universidad de San Carlos de Guatemala | Revista Científica
Abdallah Mahamat Nour, Frédéric Huneau, Abdou Ali, H. Mahamat Saleh, Suzanne Ngo Boum-Nkot, Bertil Nlend, Chantal-Laure Djebebe-Ndjiguim, Eric Foto, R. Sanoussi, Luis Araguás‐Araguás, Yuliya Vystavna,
Within the Lake Chad Basin, the unconfined Quaternary aquifer offers permanent and easy access to water resources. This transboundary regional aquifer is shared by Chad, Niger, Nigeria and Cameroon and extends over ~500,000 km2. Climatic conditions and repeated droughts as well as the intensification of agriculture in the region have multiple negative impacts on the aquifer such as changes in groundwater level and its quality. Being a strategic water resource for the whole Chadian region, the groundwater ...
Tópico(s): Groundwater and Watershed Analysis
2022 - Elsevier BV | The Science of The Total Environment
Stefan Terzer‐Wassmuth, Luis Araguás‐Araguás, Lorenzo Copia, Leonard I. Wassenaar,
Tritium (3H) in Earth's precipitation is vigilantly monitored since historical nuclear bomb tests because of radiological protection considerations and its invaluable role as a tracer of the global water cycle in quantifying surface, groundwater, and oceanic fluxes. For hydrological applications, accurate knowledge of 3H in contemporary local precipitation is prerequisite for dating of critical zone water and calibrating hydrogeologic transport and groundwater protection models. However, local tritium ...
Tópico(s): Climate variability and models
2022 - Nature Portfolio | Scientific Reports
Stefan Terzer‐Wassmuth, Leonard I. Wassenaar, J. M. Welker, Luis Araguás‐Araguás,
Abstract Patterns of δ 18 O and δ 2 H in Earth's precipitation provide essential scientific data for use in hydrological, climatological, ecological and forensic research. Insufficient global spatial data coverage promulgated the use of gridded datasets employing geostatistical techniques (isoscapes) for spatiotemporally coherent isotope predictions. Cluster‐based isoscape regionalization combines the advantages of local or regional prediction calibrations into a global framework. Here we present ...
Tópico(s): Isotope Analysis in Ecology
2021 - Wiley | Hydrological Processes
Jakub Surma, Sergey Assonov, Michael Staubwasser,
... Friedman 1953; Dansgaard 1954; Gonfiantini 1986; Gat 1996; Araguás-Araguás et al. 2000; Gat et al. 2000) and ...
Tópico(s): Marine and coastal ecosystems
2021 - Mineralogical Society of America | Reviews in Mineralogy and Geochemistry
Roberto Gonfiantini, Leonard I. Wassenaar, Luis Araguás‐Araguás,
Abstract We performed pan evaporation experiments with the objective of exploring the behaviour of the long‐standing Craig–Gordon (C–G) stable isotope model for evaporation under different conditions of air turbulence. The water lost through evaporation was automatically replenished so that a steady isotopic composition was reached, the value of which depended on the isotopic composition of the replenishment water and environmental parameters like temperature, relative humidity and isotopic composition ...
Tópico(s): Atmospheric aerosols and clouds
2020 - Wiley | Hydrological Processes
Sergio Cobarrubia‐Russo, Guillermo R. Barreto-Esnal, Alimar Molero-Lizarraga, Miguel A. Mariani-Di Lena,
Abstract The coast of Aragua is a home of bottlenose dolphins (BND), Atlantic spotted dolphins (ASD) and fishermen (FIS) from four towns. A photo-identification ...
Tópico(s): Animal Vocal Communication and Behavior
2020 - Cambridge University Press | Journal of the Marine Biological Association of the United Kingdom
Roberto Gonfiantini, Leonard I. Wassenaar, Luis Araguás‐Araguás, Pradeep Aggarwal,
Evaporation of water from the oceans and terrestrial environment governs the global water cycle and climate. Heavy isotope (2H,18O,17O) enrichment during evaporation led to the development of the well-known Craig-Gordon (C-G) model for quantifying evaporation. Several variables control the H and O isotopic composition of evaporating water including; the isotopic composition of the water, temperature, relative humidity, ambient vapor isotopic composition, diffusion and/or mixing at the water-air interface, ...
Tópico(s): Climate variability and models
2018 - Elsevier BV | Geochimica et Cosmochimica Acta
Noemí Lana‐Renault, Manuel López‐Vicente, Estela Nadal‐Romero, Rafael Ojanguren, José Ángel Llorente-Adán, María Paz Errea Abad, D. Regüés, Purificación Ruiz Flaño, Makki Khorchani, José Arnáez Vadillo, Nuria Esther Pascual Bellido,
... largely conditioned by the topography and soil properties. Araguás_afforestation was extensively afforested in the 1960s, with ... fast responses. Lower streamflow response was observed in Araguás_Afforestation under dry conditions; however, once the soils ...
Tópico(s): Hydrology and Sediment Transport Processes
2018 - University of La Rioja | Cuadernos de Investigación Geográfica
Leonard I. Wassenaar, Stefan Terzer‐Wassmuth, Cedric Douence, Luis Araguás‐Araguás, Pradeep Aggarwal, Tyler B. Coplen,
Water stable isotope ratios (δ2 H and δ18 O values) are widely used tracers in environmental studies; hence, accurate and precise assays are required for providing sound scientific information. We tested the analytical performance of 235 international laboratories conducting water isotope analyses using dual-inlet and continuous-flow isotope ratio mass spectrometers and laser spectrometers through a water isotope inter-comparison test.Eight test water samples were distributed by the IAEA to international ...
Tópico(s): Geology and Paleoclimatology Research
2018 - Wiley | Rapid Communications in Mass Spectrometry
Estela Nadal‐Romero, Dhais Peña‐Angulo, D. Regüés,
... information) of a humid mountain badland area—the Araguás catchment (Central Pyrenees, Spain)—from October 2005 to ... run‐off thresholds. Our results indicate that the Araguás catchment, similarly to other humid badlands, had high ...
Tópico(s): Hydrology and Watershed Management Studies
2018 - Wiley | Hydrological Processes
Takuya Matsumoto, D. Kip Solomon, Luis Araguás‐Araguás, Pradeep Aggarwal,
Tópico(s): Geophysical Methods and Applications
2017 - The Geochemical Society of Japan | GEOCHEMICAL JOURNAL
Pradeep Aggarwal, Ulrike Romatschke, Luis Araguás‐Araguás, Dagnachew Legesse Belachew, Fred J. Longstaffe, Peter Berg, Courtney Schumacher, Aaron Funk,
Tropical and midlatitude precipitation is fundamentally of two types, spatially limited and high-intensity convective or widespread and lower-intensity stratiform, owing to differences in vertical air motions and microphysical processes governing rain formation. These processes are difficult to observe or model and precipitation partitioning into rain types is critical for understanding how the water cycle responds to changes in climate. Here, we combine two independent data sets—convective and ...
Tópico(s): Tropical and Extratropical Cyclones Research
2016 - Nature Portfolio | Nature Geoscience
Ricardo Sánchez‐Murillo, Christian Birkel, Kristen Welsh, Germain Esquivel‐Hernández, José Leonardo Corrales-Salazar, Jan Boll, Erin Brooks, Olivier Roupsard, O. Sáenz-Rosales, I. Katchan, R. Arce-Mesén, Chris Soulsby, Luis Araguás‐Araguás,
Costa Rica is located on the Central American Isthmus, which receives moisture inputs directly from the Caribbean Sea and the Eastern Pacific Ocean. This location includes unique mountainous and lowland microclimates, but only limited knowledge exists about the impact of relief and regional atmospheric circulation patterns on precipitation origin, transport, and isotopic composition. Therefore, the main scope of this project is to identify the key drivers controlling stable isotope variations in ...
Tópico(s): Meteorological Phenomena and Simulations
2015 - Elsevier BV | Quaternary Science Reviews
Janine Halder, Stefan Terzer, Leonard I. Wassenaar, Luis Araguás‐Araguás, Pradeep Aggarwal,
Abstract. We introduce a new online global database of riverine water stable isotopes (Global Network of Isotopes in Rivers, GNIR) and evaluate its longer-term data holdings. Overall, 218 GNIR river stations were clustered into three different groups based on the seasonal variation in their isotopic composition, which was closely coupled to precipitation and snowmelt water runoff regimes. Sinusoidal fit functions revealed phases within each grouping and deviations from the sinusoidal functions revealed ...
Tópico(s): Groundwater flow and contamination studies
2015 - Copernicus Publications | Hydrology and earth system sciences
Produção Nacional
Revisado por pares
Pradeep Aggarwal, Takuya Matsumoto, Neil C. Sturchio, Chang Hung Kiang, Didier Gastmans, Luis Araguás‐Araguás, Wei Jiang, Zheng‐Tian Lu, Peter Mueller, Reika Yokochi, Roland Purtschert, T. Torgersen,
Tópico(s): Groundwater and Isotope Geochemistry
2014 - Nature Portfolio | Nature Geoscience
... diferenciales de poblaciones de Meloidogyne de los Estados Aragua y Zulia, Venezuela (Morphology, morphometry and differential host of populations of Meloidogyne from Aragua and Zulia State, Venezuela. Fitopatologia Venezolana 23, 5– ...
Tópico(s): Entomopathogenic Microorganisms in Pest Control
2014 - Wiley | EPPO Bulletin
Robert L. Michel, Pradeep Aggarwal, Luis Araguás‐Araguás, Türker Kurttaş, Brent D. Newman, Tomáš Vitvar,
Tritium concentrations in river and stream waters from different locations can be compared by normalizing them using the ratio of tritium concentrations in precipitation and surface water (Cp/Cs) in the study area. This study uses these ratios in a hydrological residence time context to make regional- and global-scale comparisons about river basin dynamics. Prior to the advent of nuclear weapons testing, the Cp/Cs ratio was greater than or equal to 1 everywhere because of the decay of tritium in ...
Tópico(s): Cryospheric studies and observations
2014 - Wiley | Hydrological Processes
Pradeep Aggarwal, Luis Araguás‐Araguás, M. A. Choudhry, M. van Duren, K. Froehlich,
Uptake of atmospheric CO₂ during sample collection and analysis, and consequent lowering of estimated ages, has rarely been considered in radiocarbon dating of groundwater. Using field and laboratory experiments, we show that atmospheric CO₂ can be easily and rapidly absorbed in hyperalkaline solutions used for the extraction of dissolved inorganic carbon, resulting in elevated ¹⁴C measurements. Kinetic isotope fractionation during atmospheric CO₂ uptake may also result in decrease of δ¹³C, leading ...
Tópico(s): Atmospheric and Environmental Gas Dynamics
2013 - Wiley | Ground Water
Stefan Terzer, Leonard I. Wassenaar, Luis Araguás‐Araguás, Pradeep Aggarwal,
Abstract. A regionalized cluster-based water isotope prediction (RCWIP) approach, based on the Global Network of Isotopes in Precipitation (GNIP), was demonstrated for the purposes of predicting point- and large-scale spatio-temporal patterns of the stable isotope composition (δ2H, δ18O) of precipitation around the world. Unlike earlier global domain and fixed regressor models, RCWIP predefined 36 climatic cluster domains and tested all model combinations from an array of climatic and spatial regressor ...
Tópico(s): Hydrology and Watershed Management Studies
2013 - Copernicus Publications | Hydrology and earth system sciences
Naoyuki Kurita, Brent D. Newman, Luis Araguás‐Araguás, Pradeep Aggarwal,
Abstract. Recent commercially available laser spectroscopy systems enabled us to continuously and reliably measure the δD and δ18O of atmospheric water vapor. The use of this new technology is becoming popular because of its advantages over the conventional approach based on cold trap collection. These advantages include much higher temporal resolution/continuous monitoring and the ability to make direct measurements of both isotopes in the field. Here, we evaluate the accuracy and precision of ...
Tópico(s): Atmospheric Ozone and Climate
2012 - Copernicus Publications | Atmospheric measurement techniques
Dan Lapworth, Alan MacDonald, Moshood N. Tijani, W.G. Darling, Daren C. Gooddy, H.C. Bonsor, Luis Araguás‐Araguás,
Although shallow groundwater (<50 mbgl) sustains the vast majority of improved drinking-water supplies in rural Africa, there is little information on how resilient this resource may be to future changes in climate. This study presents results of a groundwater survey using stable isotopes, CFCs, SF6, and 3H across different climatic zones (annual rainfall 400–2,000 mm/year) in West Africa. The purpose was to quantify the residence times of shallow groundwaters in sedimentary and basement aquifers, ...
Tópico(s): Groundwater and Watershed Analysis
2012 - Springer Science+Business Media | Hydrogeology Journal